The default number of cylinders in the user space is 10,200 for MAF3364FC and 9,866 for MAG series. The user, however, can select the number of cylinders to be allocated in the user space by specifying 10,200 for MAF3364FC and 9,866 for MAG series as the maximum and the number of alternate cylinders + 1 as the minimum. The user can also specify the number of logical data blocks to be placed in the user space with the MODE SELECT or MODE SELECT EXTENDED command. When the number of logical data blocks is specified, as many cylinders as required to place the specified data blocks are allocated in the user space.

A number starting with 0 is assigned to each cylinder required in the user space in ascending order. If the number does not reach 10,200 (MAF3364FC) and 9,866 (MAG series), the rest of the cylinders will not be used.

Always one alternate cylinders can be established in the user space. Alternate cylinders will be used for alternate blocks when primary cylinders in the user space are used up. See Subsections

3.1.2 and 3.3.2 for details.

(2)Internal test space

The Internal test space is an area for diagnostic purposes only and its data block length is always 512 byte. The internal test space consists of only 1 cylinder and outer-host cylinder (–37) is always assigned. The user cannot change the number of cylinders in the internal test space or their positions.

The IDD reads or writes the data block in the CE space during the self-diagnostic test specified with the setting terminal (diagnostic mode) or a SEND DIAGNOSTIC command.

(3)System space

The system space is an area for exclusive use of the IDD itself and the following information are recorded. The length of the data block is always 512 bytes.

∙ Defect list (P list and G list)

∙ MODE SELECT parameter (saved value) ∙ Statistical information (log data)

∙ Controller control information

The above information are duplicated in several different locations for safety.

Note:

The system space is also called SA space.

3.1.2Alternate spare area

The alternate spare area is provided in the last track of each primary cylinder in the user space, and in the last track of the cylinder and the alternate cylinder.

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Fujitsu MAG3182FC, MAG3091FC, MAF3364FC manual Alternate spare area
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MAG3182FC, MAF3364FC, MAG3091FC specifications

Fujitsu has established itself as a leading provider of storage solutions, with a robust lineup that includes the MAG3182FC, MAG3091FC, and MAF3364FC hard drives. These models cater to the needs of enterprise and data center environments, focusing on reliability, performance, and advanced technology.

The Fujitsu MAG3182FC is a Fibre Channel hard drive designed for high-speed data transfer and optimal storage performance. With a capacity of 18.2 GB, it is built for applications requiring rapid access to data. The drive operates at a spindle speed of 10,000 RPM, ensuring quick data retrieval and low latency. It features a 2 Gbps Fibre Channel interface, which allows for fast communication between the drive and the server, making it ideal for environments that demand high throughput, such as transaction processing and database management.

Next in line is the Fujitsu MAG3091FC. This model takes the capabilities of its predecessor a step further with a capacity of 9.1 GB and similar 10,000 RPM speed. The MAG3091FC is also equipped with a 2 Gbps Fibre Channel interface, providing the same high-performance connectivity. Its reliability is enhanced with advanced error correction and a design that minimizes the risk of data loss, making it suitable for mission-critical applications where uptime is essential.

Lastly, the Fujitsu MAF3364FC hard drive is tailored for enterprise-level operations, featuring a capacity of 36.4 GB. It utilizes a 10,000 RPM spindle speed and is built with the same 2 Gbps Fibre Channel interface, ensuring swift access to stored data. The MAF3364FC stands out for its improved data integrity features, including sophisticated error correction codes and a robust design that enhances durability. Its higher capacity combined with fast access times makes it a versatile choice for data-intensive applications and large-scale storage solutions.

All three drives incorporate Fujitsu's commitment to innovation, featuring technologies like S.M.A.R.T (Self-Monitoring, Analysis, and Reporting Technology) for predictive failure analysis. They are designed to operate in demanding environments, ensuring that businesses can rely on them for consistent performance and data protection. In summary, the Fujitsu MAG3182FC, MAG3091FC, and MAF3364FC represent a powerful collection of enterprise-grade hard drives, providing advanced features and technologies that meet the rigorous demands of modern data storage needs.
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